Signaling a cancel flag in a video bitstream

Abstract

A method of coding implemented by a video encoder. The method includes encoding a representation of video data into a bitstream, the bitstream being prohibited from including a fisheye supplemental enhancement information (SEI) message and one of a projection indication SEI message and a frame packing indication SEI message that both apply to any particular coded picture in the bitstream; and transmitting the bitstream to the video decoder.

What is claimed is: 
     
       1. A non-transitory computer-readable storage medium storing a bitstream of a video, the bitstream comprising a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that a video decoder shall ignore SEI messages of the different type. 
     
     
       2. The storage medium of  claim 1 , wherein the second SEI message corresponds to omnidirectional video. 
     
     
       3. The storage medium of  claim 1 , wherein the second cancel flag corresponds to omnidirectional video. 
     
     
       4. The storage medium of  claim 1 , wherein the second SEI message comprises a fisheye video information SEI message. 
     
     
       5. The storage medium of  claim 1 , wherein the second cancel flag comprises a fisheye_cancel_flag. 
     
     
       6. A non-transitory computer-readable storage medium storing instructions that, wherein executed by one or more processors, cause a video processing apparatus to:
 receive an encoded bitstream containing a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that a video decoder shall ignore SEI messages of the different type; and 
 decode the encoded bitstream according to the frame packing arrangement cancel flag. 
 
     
     
       7. The storage medium of  claim 6 , wherein the second SEI message corresponds to omnidirectional video. 
     
     
       8. The storage medium of  claim 6 , wherein the second cancel flag corresponds to omnidirectional video. 
     
     
       9. The storage medium of  claim 6 , wherein the second SEI message comprises a fisheye video information SEI message. 
     
     
       10. The storage medium of  claim 6 , wherein the second cancel flag comprises a fisheye_cancel_flag. 
     
     
       11. A non-transitory computer-readable storage medium storing instructions that, wherein executed by one or more processors, cause a video processing apparatus to:
 encode a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture into a bitstream, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that a video decoder shall ignore SEI messages of the different type; and 
 transmit the bitstream toward the video decoder. 
 
     
     
       12. The storage medium of  claim 11 , wherein the second SEI message corresponds to omnidirectional video. 
     
     
       13. The storage medium of  claim 11 , wherein the second cancel flag corresponds to omnidirectional video. 
     
     
       14. The storage medium of  claim 11 , wherein the second SEI message comprises a fisheye video information SEI message. 
     
     
       15. The storage medium of  claim 11 , wherein the second cancel flag comprises a fisheye_cancel_flag.